<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="./star.css">
    <title>star</title>      
</head>
<body>
    <div id="box">
    <div><span id="span1"></span></div> <br>
    <button id="btn1">开始游戏</button>
    <button id="btn2">结束游戏</button>
    <div>游戏剩余时间：<span id="span2">100</span>秒</div>
    <div class="box">得分:0分</div>
    </div>
</body>
</html>
<script src="./star.js"></script>